The Bill of Rights specifically enumerates the rights of individuals and thus provides protection against an over-powerful national government.
In clearly stating a person's inherent rights, that the government can't take away, the bill of rights protects the citizens from an over-powerful government.
There is an agreement of price and quantity in the market therefore all market forces stabilized and reached a price that consumers are willing to pay for goods and producers a price at which they are willing to produce in order to make a profit
I believe the answer is D: It revolves around the family unit.